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Related Experiment Video

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Microfluidic Buffer Exchange for Interference-free Micro/Nanoparticle Cell Engineering
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Microfluidic deformability-activated sorting of single particles.

Gihoon Choi1, Reza Nouri1, Lauren Zarzar2,3

  • 1Department of Electrical Engineering, Pennsylvania State University, University Park, PA 16802 USA.

Microsystems & Nanoengineering
|September 27, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a microfluidic device for real-time, single-particle sorting based on deformability. This innovation enables rapid cell characterization and potential applications in mechanobiology research.

Keywords:
EngineeringMicrofluidics

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Area of Science:

  • Biophysics
  • Microfluidics
  • Cell Biology

Background:

  • Mechanical properties are crucial for understanding cell behavior and disease.
  • Label-free characterization of particle deformability is essential for biological studies.
  • Existing methods for deformability analysis and sorting are often time-consuming or lack single-particle resolution.

Purpose of the Study:

  • To develop and validate a microfluidic device for single-particle-resolved, deformability-activated sorting in continuous flow.
  • To integrate real-time deformability measurement with active hydrodynamic sorting on a single chip.
  • To analyze factors influencing sorting dynamics and device throughput.

Main Methods:

  • Development of a microfluidic chip integrating transit-time-based deformability measurement and active hydrodynamic sorting.
  • Modeling and experimental approaches to identify critical factors affecting sorting dynamics.
  • Synthesis and use of poly(ethylene glycol) diacrylate (PEGDA) hydrogel beads as a model system for validation.

Main Results:

  • A novel microfluidic device capable of real-time, one-by-one particle sorting based on deformability was demonstrated.
  • Device throughput was determined to be 600 particles/min, with each particle analyzed and sorted in approximately 100 ms.
  • Achieved 88% purity and 73% average efficiency in deformability-activated sorting using PEGDA hydrogel beads.

Conclusions:

  • The developed microfluidic device offers a powerful tool for label-free, high-throughput sorting of deformable particles.
  • This technology enables real-time cell mechanotyping and opens avenues for correlational studies between cell mechanics and molecular mechanisms.
  • The single-particle-resolved sorting capability is anticipated to advance cell biology and disease diagnostics.